Outlook Mail and Calendar for Windows 10 Mobile has received a fresh update, but there doesn't look to be anything new or noteworthy to report. We haven't spotted any new user-facing features or changes, and the lack of a new changelog indicates that this update may simply be bug fixes and performance improvements.
Still, if you're interested in version numbers, the update bumps the app up from version 17.6568.16732 to 17.6568.16822. The update also only appears to be landing for mobile at the moment, but we wouldn't be surprised to see it arrive on desktop machines as well. In any case, you can go ahead and grab the latest update from the link below, and let us know in the comments if you spot anything new.
Thanks for the tips, Lokesh and Henock!